Discussions By Condition: I cannot get a diagnosis.

15 year old girl, need help!

So I'm 15, but when i was around eleven I noticed this bump in between my legs (like vagina area?) It looked like a zit or something at first but now its bigger and kind of sticks out. It's like a flap or something, idk.. I've never worn a tampon because I'm afraid its covering the vagina or something. I got my period when i was 12, and every other part of my body is normal, I'm not overweight, and I've never had sex or anything. I don't know what to do now because I'm scared it won't go away. It doesn't hurt or anything, but its annoying.. I've researched a lot but i cant really find anything that is like my situation. I don't want to tell my mom or doctor so please don't suggest that. Could using body wash down there have caused this?? Is this normal and what can do I to make it go away? please help! thanks